Apply suggestions from code review

Co-authored-by: intrigus-lgtm <60750685+intrigus-lgtm@users.noreply.github.com>

Author: JLLeitschuh

java/ql/lib/change-notes/2022-03-18-test-assertion-guards.md

@@ -1,4 +1,4 @@
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 category: minorAnalysis
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-* Added guard preconditon support for assertion methods for popular testing libraries (eg. Junit 4, Junit 5, TestNG).
+* Added guard preconditon support for assertion methods for popular testing libraries (e.g. Junit 4, Junit 5, TestNG).